<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

    <style>
        * {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        #shop-car li {
            border: 1px dotted red;
            margin: 20px 0;
            padding: 20px;
        }

        .container {
            width: 400px;
            padding: 20px;
        }
    </style>

    <div class="container">
        <input type="checkbox" id="isAllCheck" /> 全选


        <ul id="shop-car">
            <!-- <li>
                <input type="checkbox" />
                <div>商品名称:</div>
                <img src="https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg"
                    alt="">
                <div>商品价格:50</div>
                <div>购买数量:30</div>
                <div>商品规格: 黑</div>
                <div>是否选中：选中吧OR不选中</div>
            </li> -->
        </ul>
        <p id="totalnum">总数量：xxx</p>
        <p id="totalprice">总价格：xxx</p>
    </div>


</body>

</html>
<script>
    var products = [
        {
            goods_name: '小米10-1',
            goods_img: 'https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg',
            goods_price: '500',
            goods_attr: '砂石黑4GB+64GB',
            goods_num: 10,
            goods_is_checked: true
        },
        {
            goods_name: '小米10-2',
            goods_img: 'https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg',
            goods_price: '510',
            goods_attr: '砂石黑4GB+64GB',
            goods_num: 50,
            goods_is_checked: true
        },
        {
            goods_name: '小米10-3',
            goods_img: 'https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg',
            goods_price: '500',
            goods_attr: '砂石黑4GB+128GB',
            goods_num: 30,
            goods_is_checked: true
        }
    ]

    var str = ""
    /* for(var i=0;i<products.length;i++){
        str +=`<li>
                <div> <input type="checkbox"  ${ products[i].goods_is_checked?"checked":""   }/></div>


                <div>商品名称:${products[i].goods_name}</div>
                <img src="${products[i].goods_img}"
                    alt="">
                <div>商品价格:${products[i].goods_price}</div>
                <div>购买数量:${products[i].goods_num}</div>
                <div>商品规格: ${products[i].goods_attr}</div>
            </li>`
    } */

    // console.log(str);

    products.forEach(function (value) {
        str += `<li>
                <div> <input type="checkbox"  ${value.goods_is_checked ? "checked" : ""}/></div>


                <div>商品名称:${value.goods_name}</div>
                <img src="${value.goods_img}"
                    alt="">
                <div>商品价格:${value.goods_price}</div>
                <div>购买数量:${value.goods_num}</div>
                <div>商品规格: ${value.goods_attr}</div>
            </li>`
    })


    var shopCar = document.getElementById("shop-car")
    shopCar.innerHTML = str


    // 总数量
    var sum = 0
    var price=0
    var totalnum = document.getElementById("totalnum")
    var totalprice = document.getElementById("totalprice")
    products.forEach(function (value) {

        if (value.goods_is_checked) {
            sum+=value.goods_num
            price+=value.goods_num*value.goods_price
        }
    })
    // console.log(sum);
    totalnum.innerHTML="总数量："+sum
    totalprice.innerHTML="总价格："+price


    // 全选
    var isAllCheck=document.getElementById("isAllCheck")
    // var  flag= products.every(function(value){
    //     return value.goods_is_checked
    // })

    

    // if(flag){
    //     isAllCheck.checked=true
    // }else{
    //     isAllCheck.checked=false
    // }

    // if(flag){
    //     // console.log(flag);//true
    //     // isAllCheck.checked=true

    //     isAllCheck.checked=flag
    // }else{
    //     // console.log(flag);//false
    //     // isAllCheck.checked=false

    //     isAllCheck.checked=flag
    // }



    // isAllCheck.checked=flag


    isAllCheck.checked= products.every(function(value){
        return value.goods_is_checked
    })



</script>